Jill of the Jungle: Jill Saves the Prince

Jill of the Jungle is a platform sidescroller which was released during the same period as Commander Keen and Duke Nukem. Players play as an Amazon woman who can use various types of weapons and enhancements as she progresses through levels slaying monsters and finding keys. The first episode in the trilogy (Jill of the Jungle) contains 15 playable levels, including a bonus level, each of which can be entered from an overworld resembling another level. The second episode (Jill of the Jungle: Jill Goes Underground) )uses 20 sequential levels without an overworld. This third episode's overworld is a top-down perspective, changing to the traditional platformer style when entering one of the 15 levels. (Wikipedia)

The story thus far: after having explored the jungle and defeated the forces of darkness in the first two games, Jill must endure another quest in order to save the jungle from being destroyed: Jill must save the prince, who has been kidnapped by an evil green lizardman who wishes to destroy the jungle and build condos instead. Unless Jill saves the prince, he will succeed in his evil cause.